论文部分内容阅读
研究了陶瓷粉填充聚合物基过电流保护元件的导电性能、电阻-温度特性及微观形貌。随着陶瓷粉体积分数的增加,过电流保护元件的电阻逐渐降低;当陶瓷粉体积分数达到某一临界点时,过电流保护元件的电阻急剧下降;继续增加陶瓷粉体积分数,过电流保护元件的电阻的减小趋势变缓。随着温度的升高,过电流保护元件的电阻率逐渐增加;当温度接近聚合物熔融温度Tm时,导电网络被破坏,过电流保护元件的电阻率会大幅增加,产生电阻正温度效应;超过Tm后,过电流保护元件一直处于高阻状态。
The conductive properties, resistance-temperature characteristics and microstructure of ceramic powder-filled polymer-based overcurrent protection devices were studied. With the ceramic powder volume fraction increases, the over-current protection element resistance gradually decreased; when the ceramic powder volume fraction reaches a certain critical point, the resistance of the over-current protection element drops sharply; continue to increase the volume fraction of ceramic powder, The decrease in the resistance of the current protection element tends to be slow. As the temperature rises, the resistivity of the over-current protection element gradually increases; when the temperature is close to the polymer melting temperature Tm, the conductive network is destroyed, the resistivity of the over-current protection element will increase drastically, resulting in the positive temperature effect of the resistance; Tm, over-current protection device has been in a state of high resistance.